Video: Linq entity moj khaum yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
LINQ rau Cov koom haum muab lus-Integrated Query ( LINQ ) kev txhawb nqa uas ua rau cov neeg tsim khoom sau cov lus nug tawm tsam Lub Koom Haum Ua Haujlwm qauv tswv yim siv Visual Basic lossis Visual C#. Cov lus nug tawm tsam Lub Koom Haum Ua Haujlwm yog sawv cev los ntawm cov lus nug ntoo, uas ua rau cov ntsiab lus ntawm cov khoom.
Ua raws li qhov no hauv kev txiav txim siab, Linq puas yog ib feem ntawm Entity Framework?
Lub Koom Haum Ua Haujlwm yog ib qho kev sib txheeb ze ze (ORM) lub moj khaum rau kev txuas C# code rau sab nraud databases, feem ntau SQL Server. LINQ yog cov lus nug hauv C# thiab cov txheej txheem txuas ntxiv txhawm rau ua kom nws muaj txiaj ntsig.
Ib yam li ntawd, kev siv Linq hauv C# yog dab tsi? LINQ stands rau Language Integrated Query, yog li lub npe vim nws yog ib feem ntawm lub programming lus nyiam C# . LINQ Stands for Language Integrated Query, yog li lub npe vim nws yog ib feem ntawm cov lus programming nyiam C# . Nws yog siv los muab kev nkag mus tau zoo ib yam rau ntau yam ntaub ntawv xws li databases thiab XML.
Yog li ntawd, dab tsi yog qhov chaw hauv Entity Framework?
Ib Qhov chaw nyob hauv Entity Framework yog ib chav kawm uas maps rau lub rooj database. Cov chav kawm no yuav tsum suav nrog DbSet yam cuab yeej hauv chav kawm DbContext. EF API maps txhua qhov chaw rau ib lub rooj thiab txhua yam khoom ntawm ib qho qhov chaw mus rau ib kem hauv database. Cov Tub Ntxhais Kawm, thiab Qib yog cov koom haum.
Peb puas tuaj yeem siv Linq yam tsis muaj Qhov Chaw Ua Haujlwm?
Yog lawm. LINQ rau SQL siv Object Relational Mapping uas yog dab tsi Lub Koom Haum Ua Haujlwm yog. Yog li thaum koj tuaj yeem ua tau "tsis yog siv Entity Framework ", koj ib txwm cuam tshuam nrog qee hom ORM.. uas yog dab tsi Kuv xav tias koj xav zam.
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